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K4COW

Active1x3District 4

Competitive callsign — 4 applications filed with the FCC.

License HolderKrumbein, Marc

License ClassGeneral

Min. Class RequiredGeneral

LocationAnnandale, VA

Grant DateMar 28, 2017

Expiration DateMar 28, 2027

K4COW is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Krumbein, Marc in Annandale, VA. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Pegues, Charles M on Mar 4, 2025. K4COW has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

-.- ....- -.-. --- .--

CW Weight: 38 units(Moderate)

Voice Phonetics

Kilo Four Charlie Oscar Whiskey

Readability: 8/10(High readability)

License History

License IssuedMar 28, 2017
Vanity Callsign GrantedMar 28, 2017
License ExpiredNov 1, 2016
Tax ID (TIN) AddedAug 9, 2004
License RenewedAug 9, 2004

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Pegues, Charles MFiled Mar 4, 2025
Not awardedFCC ↗
Krumbein, MarcFiled Mar 8, 2017
Not awardedFCC ↗
PAYNE, CURTIS HFiled Oct 27, 2016
Not awardedFCC ↗
Morton, Shane MFiled Oct 16, 2014

Search external databases

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Explore nearby callsigns

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FCC data as of Sep 4, 2026

Not awarded

K4COW FCC Vanity Status: 4 Competing Applications & History